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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '89449abd01648c8e58c6ed33da3c75af9823d53ac8d19169bb19a1ffecfca8d0' 
  AND token = 'xIqQ5rgMrb6g28h2RmCABQaLPgm9MCtMiOV9viIpGDg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}